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- #include <stdio.h>
- #include <unistd.h>
- #include <sys/types.h>
- #include <sys/time.h>
-
- int
- input_timeout (int filedes, unsigned int seconds)
- {
- fd_set set;
- struct timeval timeout;
-
- /* Initialize the file descriptor set. */
- FD_ZERO (&set);
- FD_SET (filedes, &set);
-
- /* Initialize the timeout data structure. */
- timeout.tv_sec = seconds;
- timeout.tv_usec = 0;
-
- /* @code{select} returns 0 if timeout, 1 if input available, -1 if error. */
- return TEMP_FAILURE_RETRY (select (FD_SETSIZE,
- &set, NULL, NULL,
- &timeout));
- }
-
- int
- main (void)
- {
- fprintf (stderr, "select returned %d.\n",
- input_timeout (STDIN_FILENO, 5));
- return 0;
- }
-